Car totbeh



Sept; 25, 1928.

J. D. THOMPSON CAR UNDERFRAME Filed April 1 WWSOIE Sept 25, 1928,,

J. D. THQMPSON CAR UNDERFRAME Filed April 1927 2, Sheets-Sheet 2 'nect' the diaphragms thereto. lVithin 2 it will be observed that the angular member 34: is relatively shallow from its rear end at a; to the point where it increases in depth at the bolster, and of a considerably ii'icreased depth "from the point 7 for- \vardly to the anti-climber before referred to.

The side sills 10 are as shallow as is con sistent with the strength required throughout the major portion of the length of the under- ;t'rame, but near the door openings, and spanning such door openings, the side sills are reinforced by the addition of top and bot tom plates and L6 which, as shown in Fig. 1, extend from the bolster rearwardly a sutlicient distance to span a door opening provided in the superstructure or car body to be carried upon the underframe illustrated. are connected by gusset plates lTwith the top cover plate of the bolster before referred to and are riveted to the top and bottom flanges of the channel side sills as illustrated in Figs. 1, 4 and 5. c

At convenient intervals throughout the length of the car, cross bearers are provided which are formed, as best shown in Fig. 5, with diaphragms extending from the side sills to the center sill and with panshaped pressed filler members 51 interposed between such diaphragms and between the top and bottom cover plates 52 and 53, respectively, of such cross bearers. Supplementing the details of the cross hearers referred to are pressed struts 54 which are connected at their upper portion by means of the rivets 55 with the longitudinally extending flanges ot' the cross bear-er diaphragms 50 and are connected by. means of the rivets 56 with the horizontal flanges of said diaphragms 50 and with the bottom cover plates 53 of the cross bearers, and it will be observed that the struts 54. are angle-shaped in crossseetion, that is, there is a vertical web and a horizontal flange, as best shown in Fig. 5. p 7

The cover plates 52 and 53 of the cross bearers are connected by rivets 57 to the top and bottom flanges of the cross bearer diaphragms, as best shown in Figs. 1 and 5, and said cover plates extend less than the entire length of said diaphragms towards the side sills. Intermediate the cross bearers referred to are floor supports 60 at conven- These reinforcing plates 45 and 46' ient intervals, said floor supports being connected to thevertical and horizontal portions 5 and 6 of the center sill by rivets (31, as shown at the left of Fig. 5. Where the floor supports 60 are connected with the center sill within the zone of the members 34;, as shown at Fig. l, the rivets 62 pass through the vertical flanges of the floor supports (50 and through the vertical portion 5 of the center sill.

It is to be understood that while only one end portion of an undertrame is shown in Figs. 1 and 2, such parts are duplicated at the opposite end of the undertrame, and as many cross bearers and floor supports are supplied as may be required throughout the length oi. the undertrame.

That is claimed is:

1. In an underframe, a center sill formed of a single piece of material and having a plurality oi top and bottom flanges, vertical webs and an arch-shaped intermediate portion in combination with angle-shaped reinforcing members paralleling and being connected directly to said vertical webs.

2. In an underfran'ie, a single center sill having a plurality of top and bottom flanges, vertical webs and an intermediate web portion connecting said bottom flanges, in combination with bolster diaphragms connected with said vertical webs and a top bolster cover plate connected with the top flanges of the sill and with said intermediate web portion,

3. In an undertrame, a single center sill comprising a plurality of vertical web portions, a plurality of top and bottom flanges and an intermediate web portion connecting the bottom flanges and extending to the plane of the top flanges.

l. In an underframe, a single center sill comprising a plurality of vertical web portions with horizontal top flanges and a horizontal portion spaced from the flanges and arranged in the plane of the latter.

5. In combination, side sills, a. center sill,

.an end sill construction enclosing an end portion thereof, said end sill con'iprising a plurality of diaphragms lapping the side sills and said center sill, top and bottom cover plates, and a ribbed end member to which the cover plates are secured.

6. in combination, flanged side sills. bolsters. horizontal reinforcing plates oil less length than said sills secured upon the flanges of said sills intermediate the bolster, a center sill. intersecting said bolster, a bolster cover plate connected directly to said center sill and to said side sills and tie plates connecting the reinforcing plates to the bolster cover plate.

7. In an underirame, a bolster intersected by a single center sill having a plurality of top and bottom flanges, vertical webs and an arch-shaped intermediate portion in com- Ill] binati on With angle-shaped reinforcing mcmhers paralleling and being connected direct-- her and a top cover plate.

9. In an nnderframe, a center sill having a plurality 01 top and bottom flanges, vertical webs connecting the top and bottom llanges, and an arch-shaped portion connected to the bottom flanges and arranged intermediate the vertical Webs.

10. In an nnder'trame, a center sill com- I prising a single unit having a plurality of top and bottom flanges, vertical Webs connecting the top and bottom flanges, and an arch-shaped port-ion connected to the bottom flanges.

11. In an underframe, a center sill formed of a single piece of material and having a plurality of top and bottom flanges, vertical Webs connecting the top and bottom flanges, and an arch-shaped portion connecting the bottom flanges and provided With a horizontal portion arranged in substantially the sai'ne horizontal plane as the top flanges and spaced from the latter.

12. in an underlrame, a center sill com prising a unit formed of a single piece of material having a plurality of top and bottom flanges, vertical Webs connecting said flanges, and an ttlfCl1-Slli1POtl portion intermediate the bottom flanges and of a height substantially equal to the distance between the top and bottom flanges.

ln combination, a center sill havii'lg vertical portions and a web portion con- 'l to said vertical por'ons and spaced com, a bolster com 'irioing diaphragms connected to said vertical portions, a bolster cover plate.connected to said .Web portion, cross bearers, and side sills connecting said cross bearers and bolster.

14:. in combination, Hanger side sills, bolsters, horizontal reinforcing plates secured to the flanges oi the said side sills with one end arranged adjacent one bolster and the other end terminating short of the other bolster, a center sill, bolster cover plates, and tie plates extending across the meeting edges of the bolster and reinforcing plates and secured tiereto.

15. In combination, flanged side sills, bolstor relatively short horizontal reinforcing plates secured to the flanges of said side sills adjacent one bolster, a center sill, a bolster cover plate for each bolster, and tie plates connecting the reinforcing plates and the adjacent bolster.

l6. ln combination, flanged side sills, a bolster, relatively short reinforcing members secured to the side sills adjacent to bolster, an end sill, a center sill, tie plates connecting the reinforcing members and the bolster, and flanged members of gradually increasing height secured to the center sill and extending from the rear of the bolster to the end sill.

17. In a car nnderlrame, a center sill formed of a single piece of material and comprising a plurality of top and bottom flanges, vertical Webs and an arch-shaped portion intermediate the bottom flanges, and means for reinforcing the end portion of the sill compr :ing opposed members socured to each vertical Web and extending to a point adjacent the end of the sill.

18. in a car underjlraine, a center sill formed of a. single piece of material and C0111? prising a plurality oi top and bottom flanges, vertical Webs and an arch-shaped portion intermediate the vertical Webs, and means for strengtl'iening the end portion of the sill comprising opposed members of gradually increasing height secured to each vertical Web at the end portions thereof.

19. In a ar nnderil'rame, a center sill formed of a single piece of material and comprising a plurality of top and bottom flanges, verti a l Webs and an arch-shaped portion intermediate the vertical Webs, a bolster, and means for reinforcing the end portion of the sill comprising opposed members ot gradually increasing height secured to the vertical Webs and extending from a point in the rear the bolster toa pointadjacent the ends of the Webs.

In Witness whereof I have hereunto set my hand.

JOHN l). THUlllPSOll. 

